| 基于GRACE的格陵兰冰盖质量变化分析 |
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| 引用本文： | 卢飞,游为,范东明.基于GRACE的格陵兰冰盖质量变化分析[J].大地测量与地球动力学,2015,35(4):640-644. |
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| 作者姓名： | 卢飞 游为 范东明 |
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| 作者单位： | 1.西南交通大学地球科学与环境工程学院，成都市高新区西部园区，611756 |
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| 摘 要： | 基于GRACE RL05数据反演2003-01~2012-12格陵兰岛的冰盖质量变化，构建去相关滤波和高斯滤波的组合滤波方式，采用线性及二次多项式拟合分析格陵兰岛冰盖质量变化速度及加速度。结果表明，格陵兰岛冰盖呈现加速融化趋势，冰盖融化主要在南部及西北地区。扣除泄漏误差及冰川均衡调整改正，冰盖质量融化速度及加速度分别为-157.8±11.3 Gt/a，-17.7±4.5 Gt/a2，其融化速度在2010年后明显加快，由2003~2009年的-132.2 Gt/a增加到2010~2012年的-252.5 Gt/a。东北部冰盖趋于稳定。中东部地区冰盖质量变化加速度呈现正增长，显示该地区冰盖融化逐年减缓，但2010年后加速融化。
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| 关 键 词： | GRACE 格陵兰冰盖 速度 加速度 等效水高 |
| 收稿时间： | 2014-06-06 |
Analysis of Greenland Ice Mass Change Based on GRACE |
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| LU Fei,YOU Wei,FAN Dongming.Analysis of Greenland Ice Mass Change Based on GRACE[J].Journal of Geodesy and Geodynamics,2015,35(4):640-644. |
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| Authors: | LU Fei YOU Wei FAN Dongming |
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| Institution: | 1.Faculty of Geosciences and Environment Engineering，Southwest Jiaotong University，West High-Tec Zone, Chengdu 611756，China |
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| Abstract: | Greenland ice mass variations from January 2003 to December 2012 are recovered with the data of GRACE RL05. A combined algorithm of the de-correlated filter and Gaussian filter is constructed. The rate and acceleration of the Greenland ice mass change are computed by using linear and quadratic polynomial fitting. The results show that the melting of the Greenland ice sheet is accelerating on the whole island, with prominent ice sheet mass loss in the southern and northwest regions. During the recent ten years, after the deduction of the glacial isostatic adjustment and of leakage errors effects, the melting rate and acceleration of the Greenland ice sheet are -157.8±11.3 Gt/a and -17.7±4.5 Gt/a2, respectively. The melting mass has been accelerating significantly from 2010, 〖JP2〗with the rate of -132.2 Gt/a in 2003-2009 and the rate of -2525 Gt/a in 2010-2012. The melting rate in the Northeast tends toward stability, the melting acceleration of middle east Greenland is positive which shows the melting of ice mass in this district is slowing, but the melting of the ice mass is accelerating in the northeast and middle east after 2010. |
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| Keywords: | GRACE Greenland ice sheet rate acceleration equivalent water height |
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